function AD_toggle_display(toggleid) {
	/* optional default vars */
	if (arguments[1] == null) var toggletag = 'div';
	if (arguments[2] == null) var toggleclass = 'toggle'; 		/* must define in .ccs file */
	if (arguments[3] == null) var toggleclass_a = 'toggle_a_on'; 	/* must define in .ccs file */
	/* do not change anything below */
	var divs = document.body.getElementsByTagName(toggletag);
	for (var i=0; i<divs.length; i++) {
		if (divs[i].className == toggleclass) {
			if (divs[i].getAttribute("id") == toggleid) {
				divs[i].style.display = 'block';
				document.getElementById(toggleid+'_a').className = toggleclass_a;
			} else {
				divs[i].style.display = 'none';
				document.getElementById(divs[i].id+'_a').className = null;
			}
		}
	}
}